关键词: 三周期极小曲面, Gyroid胞元, 微通道, 数值模拟, 换热构件

Abstract:

In this study, microchannel heat exchangers were designed using the Gyroid structure, a type of triply periodic minimal surface (TPMS). The heat transfer and fluid flow characteristics of these heat exchangers were analyzed using numerical simulation. The Gyroid structure's mathematical representation and its unique features were discussed in detail. Simulations were conducted on heat exchanger components filled with Gyroid structures of different sizes, and the results were compared and analyzed to develop empirical correlations for heat transfer and fluid flow. To minimize pressure drop, a new design involving anisotropic Gyroid structures was proposed and its effects on heat transfer and fluid flow were investigated. The findings suggested that smaller Gyroid structures enhanced heat transfer but also increased pressure drop. The study identified empirical correlations specifically suited for the Gyroid structure, providing a foundation for designing TPMS-based heat exchangers. In the case of anisotropic Gyroid cells, expanding the size in the direction of fluid flow could improve the overall performance of heat transfer and fluid flow, but it would reduce heat transfer efficiency. Reducing the size perpendicular to the flow hardly affected the overall performance, but it could simultaneously reduce the volume and the pressure drop per unit length, and increase the heat transfer amount per unit volume. It was essential to balance these factors based on the specific design needs.

Key words: triply periodic minimal surface, Gyroid cell, microchannels, numerical simulation, heat exchange components